Designing Questions: Facilitating Creative Dialogue is a book I read.
This book is about designing questions, specifically how to formulate and think about questions.
I believe that the source of ideas and the essence of problem-solving all lie in questions, and I feel daily that the quality of questions directly correlates with the quality of outcomes.
The book makes you realize that innovation begins with questions and stimulates creativity.
Not only is it important to design questions, but also to discover them. This book teaches how to draw out questions that were previously unseen, unimagined, unconsidered, or not held as values.
I think you can learn about the depth of questions and hints on how to achieve results that exceed expectations.